In order to analyze the relationship between canopy structure and planting density of Quercus variabilis seedlings,the canopy LAI values of Q. variabilis seedlings at different densities and heights were measured byLAI-2000 plant canopy analyzer,Yaxin-1201 plant canopy analyzer and harvest method. The results showed asfollows.(1)The distribution of Q. variabilis seedlings leaves were sparse at the plant top,dense in the middle andlower part,and the height of the moving surface is 1/2 in the height of the pl...
【基金】
国家自然科学基金项目(31370621,31071321)
【更新日期】
2017-12-29
【分类号】
S792.18
【正文快照】
.作物叶面积指数(Leaf area index,LAI)是描述作物冠层结构、作物生长模型、长势评价模型、作物估产模型的重要参数,影响着作物光合作用、呼吸作用、蒸腾、能量交换等关键生理过程[1],一般情况下,LAI有个最适值.研究表明,具有水平叶的草本植物群丛最适LAI值为4~6,农作物最适LAI